Rivet-cutting machine.



J. A. SCHEFFEY.

RIVET CUTTING MACHINE. APPLICATION FILED ocT. 1. I915 Patented Oct. 23, 1917.

3 SHEETSSHEET l J. A. SCHEFFEY. RIVET CUTTING MACHINE. APPLICATION FILED OCT- 7.1915.

3 SHEETS-SHEET 2- 51H uewto z Patented Oct. 23, 1917.

J. A. SCHEFFEY. RIVEI cunme' MACHINE. APPLICATION FILED OCT- 7- 1915. 1,243,365 1 Patented 001131911 3 SHEETSSHEET 3- *si'derable; trouble is machine may MTED STATES refrns JOI-I*1\I;A. sonnrrny, on ooLUMBUs; onto.

BIVET-GUTTI'NG' MACHINE.

. Specification of Letters Patent.

1 Application filed October ToaZZ whom it may concern:

Be it known that 1, JOHN- A. SoHErrnY, a citizen of the UnitedStates, residing at 259 Willow Ave.,i'1'1 the citypfColumbu's, in the county of Franklin and State of Ohio, have invented new and useful Rivet-Cutting Machine for what is practically calledbursting rivet-heads- This invention is particularly directed to a type of machine" which may be readily transported so that it may itself be taken to the work, rather t "anto have the work brought to the machine; 7

In this connection, the main object of my invention residesin the provision of a structure whereby the severing bits may be moved toward and away from each other through the operat'on" ofa main drive shaft, it being unnecessary to reverse the direction of rotation of this drive shaft in order to accomplish the movement of.- thebits in eitherdirection. In this manner, conovercome, in thatthe be attached directly to the standard machines now in use Still a further obj ect ofthe invention resides in the specific supporting structure of the bit-supporting jaws, as well as'th'e spe- 'cific structure for accomplishing' thereversal in movement of these jaws without reversing the main driving power. 1

The preferred embodiment of my inventi'on is shown in the accompanying sheets of drawings, which similar characters of reference designate correspondingparts,

and in which:

Figure I is a view in side elevation showing my improved type of rivet cutter,

Fig. 2-is a section taken on line 2-121 of Fig. 1, a r

Fig. 3 is a section taken on line 5-3 of FigI-1, u I "Fig, 4 is aview looking: from the right ofFig l "7' v Fig. 5 is a view in perspective showing one of thejaw members,

and,

a Fig. 6' is a view in perspective of one of the'bits. I

111 these several views,there is shown a pair of jaw members 1 and 2 supported at their front Lends through the medium of a pair of links 8. 7 These links are pivotally attached at their opposite ends, as shown at 4 and 5, to the jaws 1 and 2 respectively. These jaws further carry a' pair of ,beari'ng mem vertically to receive the screw tions of the screw I rear endoftherupper j tion ofthe bolt 23- with' these; supporting clips is'one which permits of a slight shiftbits 6 .Pate teao'ct. 23, 1917.; I

7,19 5; Seria1'No.54,682.u r

at; their] forward ends, whose biting edges are designed to be inalinement to grip the rivet or. bolt to perform :theshearing action. Both-bits are rigidly held in place "by means of the E f-shaped levis' structures 7 held in place throughtie'medium of the cross plate 8 and nuts 9; The rear ends of both of the bits are bifurcated, as shown, andit is into these bifurcated portions that the'spr-ing element. 10 1s designed to seat. This spring element forms .a supplemental structure for holding the biting edges of the bits 6 in alinement, the springitself havinga hinged joint made as is s own at 11 and being ri'gidly connected to the rear end of the jaws, as is-shown at 12. rigidconnection; 12, the jaws are prevented from; coming out other .in. the'plane of Fig. 1, whereas the seating ;of this spring in the bifurcated ends of the bitsprevents their lateral shifting.

The mechanism for movingthese bits toward andyaway, from each other,- will now be described.- The-rear; end of each jaw member isbifur'cated and also-formed wit transverse bearing to pivot'ally receive-a ber, 13, these bearing members being bored shaft'14;.-. Thelower is. threaded, as shown at end of this screw shaft 15, and enters v a By means of the H of alinementwith each hso threaded bore in vthe lower bearing member 13, whilethe intermediate and upper porshaft are of square formaas is shown.- The ushing 17 rotatably tions of difierent sizes,- upper end 16 fits in a secured in the upper bearing member 13 and this directly beneath bearing portion-1s a :t-hrust'bearing designated in its entirety by the reference numeral, 18. Also secured to the-upper squaredportion of the screw sha t 19, which meshesiwith r,

15 is a bevelpinion complemental' gear 20 on the main I shaft 21.; Thisfmain drive shaf-tis suitably journaled in a yoke member 22which is suitably supported; from bolt 23 carried by the top side of the upper jaw member 1. This bolt member passes through a pair of suitable supporting clips 24: carried by the w 1 andtheconnecing back and, forth, as will be presently de scribed. The inside end of the main drive shaft 21 is also journaled in'a cross-piece 24 forming a portion 0 a horizontal yoke 25.

The forwardly projecting legs 26 of this yoke are attached to the vertical guide pieces shown at 27, whereby the jaw members are additionally guided in their move ment. By means of the two yokes 22 and 25, a supporting anism is had.

7 described, is loosely mounted upon the drive shaft 21,. but its hub is provided with a ratchet face shown at 28 designed to 00610- erate with a complemental ratchet hub '29 on the bevel gear 30. This latter gear is in turn rigidly mounted upon the shaft 21 and at times is designed to mesh with the bevel pinion shown at 81 andbeing mounted upon the drive shaft 14:. The drive shaft 21 may be operated by hand or may be coupled with any suitable driving power, so that when it rotates in a right hand direction, and the gears are in the position shown in Fig. 2, the gear 30 is rotated and because of its rotation and the'ratchet clutch between it and the gear 20, this latter is also rotated. This gear 20 is in mesh with the pinion 19 and, therefore, the screw shaft 1 1 is operated to causea movement of the jaws in one direction. Shouldit be desired to cause a reversal in movement, the operating handle shown at 32 is grasped and because of its pivotal mounting, as shown at 33, and its forked'engagement with the grooved hub portion 3 10f the gear 20, it may be moved out of mesh with the pinion 19. Similarly, the operating handle 35 is shown asbeing pivotally supported at 36 and its forked end operates in the grooved hub 37 of the pinion 31, so'that after the gear 20 has been moved out of mesh with its pinion 19, the handle 35 may be operated to move the pinion 31 into mesh with the 7 gear 30. In this manner, a reversal in the isrigidly direction of movement of the jaws is obtained without reversing the direction of rotation of the drive shaft 21. The horizontal cross piece 38 of the yoke member 22 passes beneath the collar 89 located on the screw shaft 14, beneath the pinion 31. This collar secured to the screw shaft and, as the shaft '14 moves down bearing block .13, the given a downward movejaw 2 is given an uptherefore, through the lower upper jaw 1 is wardmovement. y In order to cause the operating handles 32 and 35 to remain in their adjusted positions, I have split the handle portions, as is shown in Figs. 1 and 3, the split portions of these handles operating through the slotted guide member 40. These split portions are somewhat resilient and when they are sprung apart, they resiliently engage the slotted walls of the members 4-0. When it is desired to shift the gears, the handle portions must be first pressed toward each other and then shifted. Release will again cause frame for the drive mech-f The bevel gear 20 already upper jaw member.

. together.

between the rear tween said drive a frictional holding in a manner which must be apparent. I

From the foregoing description, it will be apparent that the biting ends of the jaws may be moved toward or away from each other by the rotation of the main drive shaft 21 continuously in the same direction. The jaws themselves pivot about the pivot points 4 and 5 and becauseof the pivotal connection of the screw shaft 14: through the medium of the bearing members 13, this pivoting action places no strain whatever upon this screw member. When the jaws are moved, the screw member moves back and forth toa very slight extent and to permit this, the connection of the bolt 23 supporting the yoke member 22 is made sufliciently loose in its passage through the supporting clips 34. In order that the device may be readily handled, it may be swung from a suitable crane and attached thereto, through any one of the attaching holes 41 in the ranged that when the center one forms the point of support,the tool is in substantially a horizontal position, while attachment through either one of the other two, will These holes are so are incline the tool to make it point up ordown.

From this,-it will be apparent that I have providedaatool in which extremely high biting pressure may be had and further, that the tool may be operated with marked convenience, in thatthe continuous rotation of the drive shaft. does not affect either the movement up or down of the jaws.

What I claim is: r

1. A rivet cutting-machine comprisinga pair of jaw members, bits on the ends of said jaw membera'means for pivotally supporting the front ends of said j aw, members, said bits projecting to the rear of said pivotal mounting, and being bifurcated attheir rear ends, idly secured at their rear members and operatively engaging; the bifurcated ends of said bits to maintain said bits in alinement, and means engaging the rear ends of said jaws for ends to said jaw 2. A rivet-cutting machine comprisinga pair of jawmembers supported to permit their front ends to travel toward each other, bits'on the'front ends of said jaws, a drive shaft, a screw shaft operatively connected ends of said jawsso that will cause movement of the jaws toward or away from a driving mechanism beshaft and said screw shaft operable to rotate said screw shaft in either rotation thereof rear ends of said each other, and.

' direction for the same rotation of said drive shaft.

3.. A rivet cuttingmachine comprising a pair of jaw members supported to permit spring arms hinged together and rigmoving said bits 7 their free ends to travel toward each other, bits on the front ends of said jaws, a drive shaft, a pair of separable bevel gears on said drive shaft, clutch mechanism between said gears, a screw shaft between the rear ends of said jaws, a pair of spaced bevel gears on said screw shaft, one for each of said first named bevel gears, and means whereby one gear said screw shaft may be thrown into mesh with one gear on said drive shaft when the other two are out of mesh and vice versa.

4. A rivet cutting machine comprising a pair of jaws supported to permit their front ends to travel toward each other, bits on the front ends of said jaws, a drive shaft, a screw shaft, a bearing block in the rear end of each jaw member in which said screw shaft is journaled, each block being pivotally mounted in said jaws at right angles to said screw shaft, and means operating be tween said drive and screw shafts for turning said screw shaft in either direction of rotation for moving said jaw members toward or away from each other.

Copies of this patent may be obtained for shaft may five cents each, by addressing the 5. A rivet cuttin machine comprising a pair of jaw members supported to permit their front ends to travel toward each other, bits in the front ends ofsaid jaws, a drive shaft, a pair of bevel gears on said drive shaft, one rigidly mounted thereon and the other slidJoly mounted thereon, a clutch mechanism between said gears, a screw shaft between the rear ends of said jaws, a pair of spaced bevel gears on said screw shaft, one being rigidly mounted thereon and the other slidably keyed thereon, and means whereby the movable gear on said screw be thrown into and out of mesh with the rigidly mounted gear on said drive shaft and whereby the movably mounted gear on said drive shaft may be moved into and out of mesh with the permanently mounted gear on said screw shaft.

Columbus, Ohio, October 5, 1915.

JOHN A. SCHEFFEY.

Witnessesz' LULU G. Sormrrnr, JoHN H. SCHEFFEY.

Commissioner of Patents,

Washington, D. 0. 

